A morphotropic phase boundary system based on polarization rotation and polarization extension

被引：566

作者：

Damjanovic, Dragan ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol Lausanne, Ceram Lab, CH-1015 Lausanne, Switzerland

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 06期

基金：

瑞士国家科学基金会;

关键词：

dielectric polarisation; ferroelectric transitions; phase diagrams; FERROELECTRIC SINGLE-CRYSTALS; SOLID-SOLUTION SYSTEMS; PIEZOELECTRIC PROPERTIES; OXIDE FERROELECTRICS; MONOCLINIC PHASE; ELECTRIC-FIELD; PEROVSKITE; CERAMICS; ENHANCEMENT; TRANSITION;

D O I：

10.1063/1.3479479

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Many ferroelectric solid solutions exhibit enhanced electromechanical properties at the morphotropic boundary separating two phases with different orientations of polarization. The mechanism of properties enhancement is associated with easy paths for polarization rotation in anisotropically flattened free energy profile. Another mechanism of properties enhancement related to free energy flattening is polarization extension. It is best known at temperature-driven ferroelectric-paraelectric phase transitions and may lead to exceedingly large properties. Its disadvantage is temperature instability of the enhancement. In this paper a temperature-composition phase diagram is proposed that exhibits compositionally driven-phase transitions with easy paths for both polarization rotation and polarization extension. (C) 2010 American Institute of Physics. [doi:10.1063/1.3479479]

引用

页数：3

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